Message style improvements

Fix one untranslatable string concatenation in pg_rewind.

Fix one message in pg_verify_checksums to use a style use elsewhere
and avoid plural issues.

Fix one gratuitous abbreviation in psql.

src/bin/pg_rewind/filemap.c

@@ -30,7 +30,7 @@ static char *datasegpath(RelFileNode rnode, ForkNumber forknum,
 static int	path_cmp(const void *a, const void *b);
 static int	final_filemap_cmp(const void *a, const void *b);
 static void filemap_list_to_array(filemap_t *map);
-static bool check_file_excluded(const char *path, const char *type);
+static bool check_file_excluded(const char *path, bool is_source);
 
 /*
  * The contents of these directories are removed or recreated during server
@@ -148,7 +148,7 @@ process_source_file(const char *path, file_type_t type, size_t newsize,
 	Assert(map->array == NULL);
 
 	/* ignore any path matching the exclusion filters */
-	if (check_file_excluded(path, "source"))
+	if (check_file_excluded(path, true))
 		return;
 
 	/*
@@ -338,7 +338,7 @@ process_target_file(const char *path, file_type_t type, size_t oldsize,
 	 * mandatory for target files, but this does not hurt and let's be
 	 * consistent with the source processing.
 	 */
-	if (check_file_excluded(path, "target"))
+	if (check_file_excluded(path, false))
 		return;
 
 	snprintf(localpath, sizeof(localpath), "%s/%s", datadir_target, path);
@@ -490,7 +490,7 @@ process_block_change(ForkNumber forknum, RelFileNode rnode, BlockNumber blkno)
  * Is this the path of file that pg_rewind can skip copying?
  */
 static bool
-check_file_excluded(const char *path, const char *type)
+check_file_excluded(const char *path, bool is_source)
 {
 	char		localpath[MAXPGPATH];
 	int			excludeIdx;
@@ -506,8 +506,12 @@ check_file_excluded(const char *path, const char *type)
 			filename++;
 		if (strcmp(filename, excludeFiles[excludeIdx]) == 0)
 		{
-			pg_log(PG_DEBUG, "entry \"%s\" excluded from %s file list\n",
-				   path, type);
+			if (is_source)
+				pg_log(PG_DEBUG, "entry \"%s\" excluded from source file list\n",
+					   path);
+			else
+				pg_log(PG_DEBUG, "entry \"%s\" excluded from target file list\n",
+					   path);
 			return true;
 		}
 	}
@@ -522,8 +526,12 @@ check_file_excluded(const char *path, const char *type)
 				 excludeDirContents[excludeIdx]);
 		if (strstr(path, localpath) == path)
 		{
-			pg_log(PG_DEBUG, "entry \"%s\" excluded from %s file list\n",
-				   path, type);
+			if (is_source)
+				pg_log(PG_DEBUG, "entry \"%s\" excluded from source file list\n",
+					   path);
+			else
+				pg_log(PG_DEBUG, "entry \"%s\" excluded from target file list\n",
+					   path);
 			return true;
 		}
 	}

src/bin/pg_verify_checksums/pg_verify_checksums.c

@@ -99,8 +99,8 @@ scan_file(const char *fn, BlockNumber segmentno)
 			break;
 		if (r != BLCKSZ)
 		{
-			fprintf(stderr, _("%s: short read of block %u in file \"%s\", got only %d bytes\n"),
-					progname, blockno, fn, r);
+			fprintf(stderr, _("%s: could not read block %u in file \"%s\": read %d of %d\n"),
+					progname, blockno, fn, r, BLCKSZ);
 			exit(1);
 		}
 		blocks++;

src/bin/psql/help.c

@@ -369,7 +369,7 @@ helpVariables(unsigned short int pager)
 	fprintf(output, _("  HISTFILE\n"
 					  "    file name used to store the command history\n"));
 	fprintf(output, _("  HISTSIZE\n"
-					  "    max number of commands to store in the command history\n"));
+					  "    maximum number of commands to store in the command history\n"));
 	fprintf(output, _("  HOST\n"
 					  "    the currently connected database server host\n"));
 	fprintf(output, _("  IGNOREEOF\n"