Don't show a version if no version has been specified

If a symbol is obsolete but we don't know when, just say obsolete.

2 files changed, 5 insertions, 1 deletions

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 554968b..56dcb04 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -11,6 +11,8 @@ file. We now provide a button to navigate to that buffer.
 
 Improved wording for functions with no source at all.
 
+Fixed an issue with obsolete aliases without version information.
+
 # v0.7
 
 Helpful buffers now start with a summary of what you're looking at,
diff --git a/helpful.el b/helpful.el
index 9ba50da..7a59d5b 100644
--- a/helpful.el
+++ b/helpful.el
@@ -210,7 +210,9 @@ Return SYM otherwise."
                      'callable-p callable-p)))
     (cond
      (obsolete-info
-      (format "%s (obsolete since %s)" sym-button (-last-item obsolete-info)))
+      (-if-let (version (-last-item obsolete-info))
+          (format "%s (obsolete since %s)" sym-button version)
+        (format "%s (obsolete)" sym-button)))
      (t
       sym-button))))