Rename `str2var` to `str_to_var` and similar

Affects the Math class, a good chunk of the audio code, and a lot of other miscellaneous classes, too.

- `var2str` -> `var_to_str`
- `str2var` -> `str_to_var`
- `bytes2var` -> `bytes_to_var`
- `bytes2var_with_objects` -> `bytes_to_var_with_objects`
- `var2bytes` -> `var_to_bytes`
- `var2bytes_with_objects` -> `var_to_bytes_with_objects`
- `linear2db` -> `linear_to_db`
- `db2linear` -> `db_to_linear`
- `deg2rad` -> `deg_to_rad`
- `rad2deg` -> `rad_to_deg`

- `dict2inst` -> `dict_to_inst`
- `inst2dict` -> `inst_to_dict`

4 files changed, 34 insertions, 34 deletions

diff --git a/doc/classes/@GlobalScope.xml b/doc/classes/@GlobalScope.xml
index bd500f6b35..6e9447eb48 100644
--- a/doc/classes/@GlobalScope.xml
+++ b/doc/classes/@GlobalScope.xml
@@ -66,7 +66,7 @@
 			<description>
 				Returns the arc cosine of [param x] in radians. Use to get the angle of cosine [param x]. [param x] must be between [code]-1.0[/code] and [code]1.0[/code] (inclusive), otherwise, [method acos] will return [constant @GDScript.NAN].
 				[codeblock]
-				# c is 0.523599 or 30 degrees if converted with rad2deg(c)
+				# c is 0.523599 or 30 degrees if converted with rad_to_deg(c)
 				var c = acos(0.866025)
 				[/codeblock]
 			</description>
@@ -77,7 +77,7 @@
 			<description>
 				Returns the arc sine of [param x] in radians. Use to get the angle of sine [param x]. [param x] must be between [code]-1.0[/code] and [code]1.0[/code] (inclusive), otherwise, [method asin] will return [constant @GDScript.NAN].
 				[codeblock]
-				# s is 0.523599 or 30 degrees if converted with rad2deg(s)
+				# s is 0.523599 or 30 degrees if converted with rad_to_deg(s)
 				var s = asin(0.5)
 				[/codeblock]
 			</description>
@@ -117,15 +117,15 @@
 				Returns the point at the given [param t] on a one-dimnesional [url=https://en.wikipedia.org/wiki/B%C3%A9zier_curve]Bezier curve[/url] defined by the given [param control_1], [param control_2], and [param end] points.
 			</description>
 		</method>
-		<method name="bytes2var">
+		<method name="bytes_to_var">
 			<return type="Variant" />
 			<param index="0" name="bytes" type="PackedByteArray" />
 			<description>
 				Decodes a byte array back to a [Variant] value, without decoding objects.
-				[b]Note:[/b] If you need object deserialization, see [method bytes2var_with_objects].
+				[b]Note:[/b] If you need object deserialization, see [method bytes_to_var_with_objects].
 			</description>
 		</method>
-		<method name="bytes2var_with_objects">
+		<method name="bytes_to_var_with_objects">
 			<return type="Variant" />
 			<param index="0" name="bytes" type="PackedByteArray" />
 			<description>
@@ -232,9 +232,9 @@
 			<description>
 				Returns the cosine of angle [param angle_rad] in radians.
 				[codeblock]
-				cos(PI * 2)      # Returns 1.0
-				cos(PI)          # Returns -1.0
-				cos(deg2rad(90)) # Returns 0.0
+				cos(PI * 2)         # Returns 1.0
+				cos(PI)             # Returns -1.0
+				cos(deg_to_rad(90)) # Returns 0.0
 				[/codeblock]
 			</description>
 		</method>
@@ -275,21 +275,21 @@
 				It can perform smoother interpolation than [code]cubic_interpolate()[/code] by the time values.
 			</description>
 		</method>
-		<method name="db2linear">
+		<method name="db_to_linear">
 			<return type="float" />
 			<param index="0" name="db" type="float" />
 			<description>
 				Converts from decibels to linear energy (audio).
 			</description>
 		</method>
-		<method name="deg2rad">
+		<method name="deg_to_rad">
 			<return type="float" />
 			<param index="0" name="deg" type="float" />
 			<description>
 				Converts an angle expressed in degrees to radians.
 				[codeblock]
 				# r is 3.141593
-				var r = deg2rad(180)
+				var r = deg_to_rad(180)
 				[/codeblock]
 			</description>
 		</method>
@@ -513,8 +513,8 @@
 				extends Sprite
 				var elapsed = 0.0
 				func _process(delta):
-				    var min_angle = deg2rad(0.0)
-				    var max_angle = deg2rad(90.0)
+				    var min_angle = deg_to_rad(0.0)
+				    var max_angle = deg_to_rad(90.0)
 				    rotation = lerp_angle(min_angle, max_angle, elapsed)
 				    elapsed += delta
 				[/codeblock]
@@ -534,7 +534,7 @@
 				See also [method inverse_lerp] which performs the reverse of this operation. To perform eased interpolation with [method lerp], combine it with [method ease] or [method smoothstep].
 			</description>
 		</method>
-		<method name="linear2db">
+		<method name="linear_to_db">
 			<return type="float" />
 			<param index="0" name="lin" type="float" />
 			<description>
@@ -543,7 +543,7 @@
 				# "Slider" refers to a node that inherits Range such as HSlider or VSlider.
 				# Its range must be configured to go from 0 to 1.
 				# Change the bus name if you'd like to change the volume of a specific bus only.
-				AudioServer.set_bus_volume_db(AudioServer.get_bus_index("Master"), linear2db($Slider.value))
+				AudioServer.set_bus_volume_db(AudioServer.get_bus_index("Master"), linear_to_db($Slider.value))
 				[/codeblock]
 			</description>
 		</method>
@@ -787,13 +787,13 @@
 				[/codeblock]
 			</description>
 		</method>
-		<method name="rad2deg">
+		<method name="rad_to_deg">
 			<return type="float" />
 			<param index="0" name="rad" type="float" />
 			<description>
 				Converts an angle expressed in radians to degrees.
 				[codeblock]
-				rad2deg(0.523599) # Returns 30
+				rad_to_deg(0.523599) # Returns 30
 				[/codeblock]
 			</description>
 		</method>
@@ -974,8 +974,8 @@
 			<description>
 				Returns the sine of angle [param angle_rad] in radians.
 				[codeblock]
-				sin(0.523599)    # Returns 0.5
-				sin(deg2rad(90)) # Returns 1.0
+				sin(0.523599)       # Returns 0.5
+				sin(deg_to_rad(90)) # Returns 1.0
 				[/codeblock]
 			</description>
 		</method>
@@ -1054,14 +1054,14 @@
 				Converts one or more arguments of any type to string in the best way possible.
 			</description>
 		</method>
-		<method name="str2var">
+		<method name="str_to_var">
 			<return type="Variant" />
 			<param index="0" name="string" type="String" />
 			<description>
-				Converts a formatted string that was returned by [method var2str] to the original value.
+				Converts a formatted [param string] that was returned by [method var_to_str] to the original value.
 				[codeblock]
 				var a = '{ "a": 1, "b": 2 }'
-				var b = str2var(a)
+				var b = str_to_var(a)
 				print(b["a"]) # Prints 1
 				[/codeblock]
 			</description>
@@ -1072,7 +1072,7 @@
 			<description>
 				Returns the tangent of angle [param angle_rad] in radians.
 				[codeblock]
-				tan(deg2rad(45)) # Returns 1
+				tan(deg_to_rad(45)) # Returns 1
 				[/codeblock]
 			</description>
 		</method>
@@ -1103,29 +1103,29 @@
 				[/codeblock]
 			</description>
 		</method>
-		<method name="var2bytes">
+		<method name="var_to_bytes">
 			<return type="PackedByteArray" />
 			<param index="0" name="variable" type="Variant" />
 			<description>
-				Encodes a [Variant] value to a byte array, without encoding objects. Deserialization can be done with [method bytes2var].
-				[b]Note:[/b] If you need object serialization, see [method var2bytes_with_objects].
+				Encodes a [Variant] value to a byte array, without encoding objects. Deserialization can be done with [method bytes_to_var].
+				[b]Note:[/b] If you need object serialization, see [method var_to_bytes_with_objects].
 			</description>
 		</method>
-		<method name="var2bytes_with_objects">
+		<method name="var_to_bytes_with_objects">
 			<return type="PackedByteArray" />
 			<param index="0" name="variable" type="Variant" />
 			<description>
-				Encodes a [Variant] value to a byte array. Encoding objects is allowed (and can potentially include code). Deserialization can be done with [method bytes2var_with_objects].
+				Encodes a [Variant] value to a byte array. Encoding objects is allowed (and can potentially include code). Deserialization can be done with [method bytes_to_var_with_objects].
 			</description>
 		</method>
-		<method name="var2str">
+		<method name="var_to_str">
 			<return type="String" />
 			<param index="0" name="variable" type="Variant" />
 			<description>
-				Converts a Variant [param variable] to a formatted string that can later be parsed using [method str2var].
+				Converts a Variant [param variable] to a formatted string that can later be parsed using [method str_to_var].
 				[codeblock]
 				a = { "a": 1, "b": 2 }
-				print(var2str(a))
+				print(var_to_str(a))
 				[/codeblock]
 				prints
 				[codeblock]
diff --git a/doc/classes/CanvasItem.xml b/doc/classes/CanvasItem.xml
index fe1fe498d1..7f411dce4f 100644
--- a/doc/classes/CanvasItem.xml
+++ b/doc/classes/CanvasItem.xml
@@ -9,7 +9,7 @@
 		Canvas items are drawn in tree order. By default, children are on top of their parents so a root [CanvasItem] will be drawn behind everything. This behavior can be changed on a per-item basis.
 		A [CanvasItem] can also be hidden, which will also hide its children. It provides many ways to change parameters such as modulation (for itself and its children) and self modulation (only for itself), as well as its blend mode.
 		Ultimately, a transform notification can be requested, which will notify the node that its global position changed in case the parent tree changed.
-		[b]Note:[/b] Unless otherwise specified, all methods that have angle parameters must have angles specified as [i]radians[/i]. To convert degrees to radians, use [method @GlobalScope.deg2rad].
+		[b]Note:[/b] Unless otherwise specified, all methods that have angle parameters must have angles specified as [i]radians[/i]. To convert degrees to radians, use [method @GlobalScope.deg_to_rad].
 	</description>
 	<tutorials>
 		<link title="Viewport and canvas transforms">$DOCS_URL/tutorials/2d/2d_transforms.html</link>
diff --git a/doc/classes/Node3D.xml b/doc/classes/Node3D.xml
index 53b93beb40..c8e2f1ac68 100644
--- a/doc/classes/Node3D.xml
+++ b/doc/classes/Node3D.xml
@@ -6,7 +6,7 @@
 	<description>
 		Most basic 3D game object, with a 3D [Transform3D] and visibility settings. All other 3D game objects inherit from Node3D. Use [Node3D] as a parent node to move, scale, rotate and show/hide children in a 3D project.
 		Affine operations (rotate, scale, translate) happen in parent's local coordinate system, unless the [Node3D] object is set as top-level. Affine operations in this coordinate system correspond to direct affine operations on the [Node3D]'s transform. The word local below refers to this coordinate system. The coordinate system that is attached to the [Node3D] object itself is referred to as object-local coordinate system.
-		[b]Note:[/b] Unless otherwise specified, all methods that have angle parameters must have angles specified as [i]radians[/i]. To convert degrees to radians, use [method @GlobalScope.deg2rad].
+		[b]Note:[/b] Unless otherwise specified, all methods that have angle parameters must have angles specified as [i]radians[/i]. To convert degrees to radians, use [method @GlobalScope.deg_to_rad].
 	</description>
 	<tutorials>
 		<link title="Introduction to 3D">$DOCS_URL/tutorials/3d/introduction_to_3d.html</link>
diff --git a/doc/classes/Vector2.xml b/doc/classes/Vector2.xml
index 19fe2e2bfc..2197947126 100644
--- a/doc/classes/Vector2.xml
+++ b/doc/classes/Vector2.xml
@@ -304,7 +304,7 @@
 			<return type="Vector2" />
 			<param index="0" name="angle" type="float" />
 			<description>
-				Returns the vector rotated by [param angle] (in radians). See also [method @GlobalScope.deg2rad].
+				Returns the vector rotated by [param angle] (in radians). See also [method @GlobalScope.deg_to_rad].
 			</description>
 		</method>
 		<method name="round" qualifiers="const">