Fix various typos and spelling mistakes in code comments

Author: Justin Pryzby
Discussion: https://postgr.es/m/20220411020336.GB26620@telsasoft.com

src/backend/utils/adt/genfile.c

@@ -59,9 +59,9 @@ convert_and_check_filename(text *arg)
 	canonicalize_path(filename);	/* filename can change length here */
 
 	/*
-	 * Roles with privleges of the 'pg_read_server_files' role are allowed to access
-	 * any files on the server as the PG user, so no need to do any further checks
-	 * here.
+	 * Roles with privileges of the 'pg_read_server_files' role are allowed to
+	 * access any files on the server as the PG user, so no need to do any
+	 * further checks here.
 	 */
 	if (has_privs_of_role(GetUserId(), ROLE_PG_READ_SERVER_FILES))
 		return filename;

src/backend/utils/adt/geo_ops.c

@@ -3878,7 +3878,7 @@ lseg_inside_poly(Point *a, Point *b, POLYGON *poly, int start)
 		Point		p;
 
 		/*
-		 * if X-intersection wasn't found  then check central point of tested
+		 * if X-intersection wasn't found, then check central point of tested
 		 * segment. In opposite case we already check all subsegments
 		 */
 		p.x = float8_div(float8_pl(t.p[0].x, t.p[1].x), 2.0);

src/backend/utils/adt/pg_locale.c

@@ -991,7 +991,7 @@ search_locale_enum(LPWSTR pStr, DWORD dwFlags, LPARAM lparam)
 						test_locale, LOCALE_NAME_MAX_LENGTH))
 	{
 		/*
-		 * If the enumerated locale does not have a hyphen ("en") OR  the
+		 * If the enumerated locale does not have a hyphen ("en") OR the
 		 * lc_message input does not have an underscore ("English"), we only
 		 * need to compare the <Language> tags.
 		 */

src/backend/utils/adt/tsquery.c

@@ -261,7 +261,7 @@ parse_or_operator(TSQueryParserState pstate)
 		/*
 		 * Suppose, we found an operand, but could be a not correct operand.
 		 * So we still treat OR literal as operation with possibly incorrect
-		 * operand and  will not search it as lexeme
+		 * operand and will not search it as lexeme
 		 */
 		if (!t_isspace(ptr))
 			break;