Prefer/encourage the simpler list form in settings documentation

docs/emcc.txt

@@ -184,16 +184,20 @@ Options that are modified or new in *emcc* are listed below:
 "-gsource-map[=inline]"
    [link] Generate a source map using LLVM debug information (which
    must be present in object files, i.e., they should have been
-   compiled with "-g"). When this option is provided, the **.wasm**
-   file is updated to have a "sourceMappingURL" section. The resulting
-   URL will have format: "<base-url>" + "<wasm-file-name>" + ".map".
-   "<base-url>" defaults to being empty (which means the source map is
-   served from the same directory as the Wasm file). It can be changed
-   using --source-map-base. It is possbile to apply path substitutions
-   to the referenced sources using the "-sSOURCE_MAP_PREFIXES" option.
-   If "inline" is specified, the sources content is embedded in the
-   source map (in this case you don't need path substitution, but it
-   comes with the cost of having a large source map file).
+   compiled with "-g").
+
+   When this option is provided, the **.wasm** file is updated to have
+   a "sourceMappingURL" section. The resulting URL will have format:
+   "<base-url>" + "<wasm-file-name>" + ".map". "<base-url>" defaults
+   to being empty (which means the source map is served from the same
+   directory as the Wasm file). It can be changed using --source-map-
+   base.
+
+   Path substitution can be applied to the referenced sources using
+   the "-sSOURCE_MAP_PREFIXES" (link). If "inline" is specified, the
+   sources content is embedded in the source map (in this case you
+   don't need path substitution, but it comes with the cost of having
+   a large source map file).
 
 "-g<level>"
    [compile+link] Controls the level of debuggability. Each level

site/source/docs/tools_reference/settings_reference.rst

@@ -3141,7 +3141,7 @@ Must be used with ``-gsource-map``.
 
 This setting allows to map path prefixes to the proper ones so that the final
 (possibly relative) URLs point to the correct locations :
-``-sSOURCE_MAP_PREFIXES=['/old/path=/new/path']``
+``-sSOURCE_MAP_PREFIXES=/old/path=/new/path``
 
 Default value: []
 

src/settings.js

@@ -2051,7 +2051,7 @@ var LOAD_SOURCE_MAP = false;
 //
 // This setting allows to map path prefixes to the proper ones so that the final
 // (possibly relative) URLs point to the correct locations :
-// ``-sSOURCE_MAP_PREFIXES=['/old/path=/new/path']``
+// ``-sSOURCE_MAP_PREFIXES=/old/path=/new/path``
 //
 // [link]
 var SOURCE_MAP_PREFIXES = [];