Make "column" definition a partial sentence (#160)

339f258

source-map.bs

@@ -280,9 +280,9 @@ Terms and definitions {#terminology}
 For the purposes of this document, the following terms and definitions apply.
 
 : <dfn>Generated Code</dfn>
-:: The code which is generated by the compiler or transpiler.
+:: code which is generated by the compiler or transpiler.
 : <dfn>Original Source</dfn>
-:: The source code which has not been passed through the compiler.
+:: source code which has not been passed through the compiler.
 : <dfn>Base64 VLQ</dfn> [[VLQ]]
 :: A [[base64]] value, where the most significant bit (the 6th bit) is used as the continuation bit,
     and the "digits" are encoded into the string least significant first, and where the least
@@ -309,15 +309,15 @@ For the purposes of this document, the following terms and definitions apply.
     The decoding of this VLQ string is the number -10.
     </div>
 : <dfn>Source Mapping URL</dfn>
-:: The URL referencing the location of a source map from the [=Generated code=].
+:: URL referencing the location of a source map from the [=Generated code=].
 : <dfn>Column</dfn>
-:: The zero-based indexed offset within a line of the generated code. How this offset is
-      measured can depend on the content type.  For JavaScript and CSS based source
-      maps, they are defined to be in UTF-16 code units analogous to JavaScript string indices. That means
-      that "A" (`LATIN CAPITAL LETTER A`) measures as 1 code unit, and "🔥" (`FIRE`) measures as 2 code
-      units.  For WebAssembly, columns are defined as byte offsets from the beginning of the binary
-      content (and there is only one group representing a line). Source maps for other content types
-      may diverge from this.
+:: zero-based indexed offset within a line of the generated code, computed as
+    UTF-16 code units for JavaScript and CSS source maps, and as byte indexes in
+    the binary content (represented as a single line) for WebAssembly source maps.
+
+    Note: That means that "A" (`LATIN CAPITAL LETTER A`) measures as 1 code unit,
+    and "🔥" (`FIRE`) measures as 2 code units. Source maps for other content types
+    may diverge from this.
 
 Source Map Format {#source-map-format}
 ======================================