docs: switch to two spaces of indentation

Based on forming consensus in #3

Author: zbeekman

.editorconfig

@@ -10,14 +10,14 @@ root = true
 
 [*.{f90,F90}]
 indent_style = space
-indent_size = 4
+indent_size = 2
 trim_trailing_whitespace = true
 max_line_length = 132
 insert_final_newline = true
 
 [{CMakeLists.txt, *.cmake}]
 indent_style = space
-indent_size = 4
+indent_size = 2
 trim_trailing_whitespace = true
 max_line_length = 132
 insert_final_newline = true
@@ -38,7 +38,7 @@ insert_final_newline = true
 
 [*.sh]
 indent_style = space
-indent_size = 4
+indent_size = 2
 trim_trailing_whitespace = true
 max_line_length = 132
 insert_final_newline = true

STYLE_GUIDE.md

@@ -30,7 +30,7 @@ This style guide is a living document and proposed changes may be adopted after
 By setting and following a convention for indentation and whitespace, code reviews and git-diffs can
 focus on the semantics of the proposed changes rather than style and formatting.
 
-* The body of every Fortran construct should be indented by __4 spaces__
+* The body of every Fortran construct should be indented by __two (2) spaces__
 * Line length *should be limited to 80 characters* and __must not exceed 132__
 * Please do not use <kbd>Tab</kbd> characters for indentation
 * Please remove trailing white space before committing code