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-rw-r--r--Documentation/git-tag.txt5
1 files changed, 4 insertions, 1 deletions
diff --git a/Documentation/git-tag.txt b/Documentation/git-tag.txt
index fa73321..1118ce2 100644
--- a/Documentation/git-tag.txt
+++ b/Documentation/git-tag.txt
@@ -17,7 +17,10 @@ SYNOPSIS
DESCRIPTION
-----------
-Adds a 'tag' reference in `.git/refs/tags/`
+
+Adds a 'tag' reference in `.git/refs/tags/`. The tag <name> must pass
+linkgit:git-check-ref-format[1] which basicly means that control characters,
+space, ~, ^, :, ?, *, [ and \ are prohibited.
Unless `-f` is given, the tag must not yet exist in
`.git/refs/tags/` directory.