Remove tabs after spaces in C comments

This was not changed in HEAD, but will be done later as part of a
pgindent run.  Future pgindent runs will also do this.

Report by Tom Lane

Backpatch through all supported branches, but not HEAD

contrib/pg_upgrade/check.c

@@ -270,7 +270,7 @@ check_cluster_compatibility(migratorContext *ctx, bool live_check)
 	FILE	   *lib_test;
 
 	/*
-	 * Test pg_upgrade_support.so is in the proper place.	 We cannot copy it
+	 * Test pg_upgrade_support.so is in the proper place.    We cannot copy it
 	 * ourselves because install directories are typically root-owned.
 	 */
 	snprintf(libfile, sizeof(libfile), "%s/pg_upgrade_support%s", ctx->new.libpath,

contrib/pg_upgrade/controldata.c

@@ -27,7 +27,7 @@ static void putenv2(migratorContext *ctx, const char *var, const char *val);
  * pg_control data.  pg_resetxlog cannot be run while the server is running
  * so we use pg_controldata;  pg_controldata doesn't provide all the fields
  * we need to actually perform the migration, but it provides enough for
- * check mode.	We do not implement pg_resetxlog -n because it is hard to
+ * check mode.  We do not implement pg_resetxlog -n because it is hard to
  * return valid xid data for a running server.
  */
 void

contrib/pg_upgrade/dump.c

@@ -33,7 +33,7 @@ generate_old_dump(migratorContext *ctx)
  *	split_old_dump
  *
  *	This function splits pg_dumpall output into global values and
- *	database creation, and per-db schemas.	This allows us to create
+ *	database creation, and per-db schemas.  This allows us to create
  *	the toast place holders between restoring these two parts of the
  *	dump.  We split on the first "\connect " after a CREATE ROLE
  *	username match;  this is where the per-db restore starts.

contrib/pg_upgrade/exec.c

@@ -117,7 +117,7 @@ verify_directories(migratorContext *ctx)
  *
  *	This function validates the given cluster directory - we search for a
  *	small set of subdirectories that we expect to find in a valid $PGDATA
- *	directory.	If any of the subdirectories are missing (or secured against
+ *	directory.  If any of the subdirectories are missing (or secured against
  *	us) we display an error message and exit()
  *
  */
@@ -153,7 +153,7 @@ check_data_dir(migratorContext *ctx, const char *pg_data)
  * check_bin_dir()
  *
  *	This function searches for the executables that we expect to find
- *	in the binaries directory.	If we find that a required executable
+ *	in the binaries directory.  If we find that a required executable
  *	is missing (or secured against us), we display an error message and
  *	exit().
  */

contrib/pg_upgrade/file.c

@@ -391,7 +391,7 @@ win32_pghardlink(const char *src, const char *dst)
 /*
  * copy_dir()
  *
- *	Copies either a directory or a single file within a directory.	If the
+ *	Copies either a directory or a single file within a directory.  If the
  *	source argument names a directory, we recursively copy that directory,
  *	otherwise we copy a single file.
  */

contrib/pg_upgrade/page.c

@@ -28,11 +28,11 @@ static pageCnvCtx *loadConverterPlugin(migratorContext *ctx,
  *	the PageLayoutVersion of the new cluster.  If the versions differ, this
  *	function loads a converter plugin and returns a pointer to a pageCnvCtx
  *	object (in *result) that knows how to convert pages from the old format
- *	to the new format.	If the versions are identical, this function just
+ *	to the new format.  If the versions are identical, this function just
  *	returns a NULL pageCnvCtx pointer to indicate that page-by-page conversion
  *	is not required.
  *
- *	If successful this function sets *result and returns NULL.	If an error
+ *	If successful this function sets *result and returns NULL.  If an error
  *	occurs, this function returns an error message in the form of an null-terminated
  *	string.
  */
@@ -122,7 +122,7 @@ getPageVersion(migratorContext *ctx, uint16 *version, const char *pathName)
  *	This function loads a page-converter plugin library and grabs a
  *	pointer to each of the (interesting) functions provided by that
  *	plugin.  The name of the plugin library is derived from the given
- *	newPageVersion and oldPageVersion.	If a plugin is found, this
+ *	newPageVersion and oldPageVersion.  If a plugin is found, this
  *	function returns a pointer to a pageCnvCtx object (which will contain
  *	a collection of plugin function pointers). If the required plugin
  *	is not found, this function returns NULL.

contrib/pg_upgrade/relfilenode.c

@@ -77,7 +77,7 @@ transfer_all_new_dbs(migratorContext *ctx, DbInfoArr *olddb_arr,
 /*
  * get_pg_database_relfilenode()
  *
- *	Retrieves the relfilenode for a few system-catalog tables.	We need these
+ *	Retrieves the relfilenode for a few system-catalog tables.  We need these
  *	relfilenodes later in the upgrade process.
  */
 void