Correction for spell check

src/uu/sort/sort.md

@@ -8,12 +8,12 @@ Display sorted concatenation of all FILE(s). With no FILE, or when FILE is -, re
 
 ## After help
 
-The key format is FIELD[.CHAR][OPTIONS][,FIELD[.CHAR]][OPTIONS].
+The key format is `FIELD[.CHAR][OPTIONS][,FIELD[.CHAR]][OPTIONS]`.
 
-Fields by default are separated by the first whitespace after a non-whitespace character. Use -t to specify a custom separator.
+Fields by default are separated by the first whitespace after a non-whitespace character. Use `-t` to specify a custom separator.
 In the default case, whitespace is appended at the beginning of each field. Custom separators however are not included in fields.
 
-FIELD and CHAR both start at 1 (i.e. they are 1-indexed). If there is no end specified after a comma, the end will be the end of the line.
-If CHAR is set 0, it means the end of the field. CHAR defaults to 1 for the start position and to 0 for the end position.
+`FIELD` and `CHAR` both start at 1 (i.e. they are 1-indexed). If there is no end specified after a comma, the end will be the end of the line.
+If `CHAR` is set 0, it means the end of the field. `CHAR` defaults to 1 for the start position and to 0 for the end position.
 
-Valid options are: MbdfhnRrV. They override the global options for this key.
+Valid options are: `MbdfhnRrV`. They override the global options for this key.