diff --git a/hgext/convert/__init__.py b/hgext/convert/__init__.py
--- a/hgext/convert/__init__.py
+++ b/hgext/convert/__init__.py
@@ -79,7 +79,7 @@ def convert(ui, src, dest=None, revmapfi
     useful if you want to e.g. give a Subversion merge two parents, or
     graft two disconnected series of history together.  Each entry
     contains a key, followed by a space, followed by one or two
-    values, separated by spaces.  The key is the revision ID in the
+    comma-separated values.  The key is the revision ID in the
     source revision control system whose parents should be modified
     (same format as a key in .hg/shamap).  The values are the revision
     IDs (in either the source or destination revision control system)
diff --git a/tests/test-convert.out b/tests/test-convert.out
--- a/tests/test-convert.out
+++ b/tests/test-convert.out
@@ -64,7 +64,7 @@ convert a foreign SCM repository to a Me
     useful if you want to e.g. give a Subversion merge two parents, or
     graft two disconnected series of history together.  Each entry
     contains a key, followed by a space, followed by one or two
-    values, separated by spaces.  The key is the revision ID in the
+    comma-separated values.  The key is the revision ID in the
     source revision control system whose parents should be modified
     (same format as a key in .hg/shamap).  The values are the revision
     IDs (in either the source or destination revision control system)