A name refused for a leading blank says a blank at its start

Both ends said a blank at its end.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

2 files changed, 4 insertions, 3 deletions

diff --git a/docs/fs.md b/docs/fs.md
index ca24034d..6084b834 100644
--- a/docs/fs.md
+++ b/docs/fs.md
@@ -565,7 +565,7 @@ in one write or as a second line on the same open (bash's `printf
 'a\nb\n' > name` writes a line at a time: the first names it). A blank inside a name is taken
 (`two words.zig`); refused, EINVAL, in acme's words (xfid.c:650) and why,
 are a blank at either end (not quietly cut off), `bad character in file
-name: a blank at its end`, a second line, `...: a newline (a name is one
+name: a blank at its start` (or `end`), a second line, `...: a newline (a name is one
 line)`, a control byte, DEL or a C1 control (U+0080-U+009F), `...: a
 control character`, and bytes that are not UTF-8, `...: not UTF-8`. `body` appends on write and replaces on truncating open. A
 terminal's `body` is its history as plain text, frozen per open, in logical
diff --git a/src/ninep/pane.zig b/src/ninep/pane.zig
index 66e3dad8..929a298a 100644
--- a/src/ninep/pane.zig
+++ b/src/ninep/pane.zig
@@ -666,7 +666,8 @@ fn nameFault(name: []const u8) ?[]const u8 {
         while (std.mem.indexOfScalarPos(u8, name, i, 0xC2)) |at| : (i = at + 1)
             if (at + 1 < name.len and name[at + 1] <= 0x9F) return e_name_char ++ ": a control character";
     }
-    if (name[0] == ' ' or name[name.len - 1] == ' ') return e_name_char ++ ": a blank at its end";
+    if (name[0] == ' ') return e_name_char ++ ": a blank at its start";
+    if (name[name.len - 1] == ' ') return e_name_char ++ ": a blank at its end";
     return null;
 }
 
@@ -1271,7 +1272,7 @@ test "name reads the file name and writing it promotes a scratch without touchin
     // off), a second line, a control byte, DEL, a C1 control, not UTF-8.
     for ([_][2][]const u8{
         .{ "trailing.zig \n", "a blank at its end" },
-        .{ " leading.zig\n", "a blank at its end" },
+        .{ " leading.zig\n", "a blank at its start" },
         .{ "tab\t.zig\n", "a control character" },
         .{ "two\nlines\n", "a newline" },
         .{ "del\x7f.zig\n", "a control character" },