Relnoted history builtin

Tweaked validation regex to use extended regexs

release_notes.html

@@ -22,6 +22,18 @@ li {
 <li>A SIGTERM now ends the whole execution stack again (<a href="https://github.com/ridiculousfish/fishfish/issues/13">from this issue</a>).
 </ul>
 
+<h3>New Features</h3>
+<ul>
+<li>A <b>history builtin</b>, and associated interactive function that enables deleting history items. Example usage:
+	
+<ul>
+<li>Print all history items beginning with echo: <span class="mono">history --search --prefix echo</span></li>
+<li>Print all history items containing foo: <span class="mono">history --search --contains foo</span></li>
+<li>Interactively delete some items containing foo: <span class="mono">history --delete --contains foo</span></li>
+</ul><br>
+Credit to Siteshwar for implementation. Thanks Siteshwar!
+</li>
+
 
 <hr>
 

share/functions/history.fish

@@ -53,8 +53,8 @@ function history --description "Deletes an item from history"
             end
 
             read --local --prompt "echo 'Delete which entries? > '" choice
-            set choice (echo $choice | tr " " "\n") 
+            set choice (echo $choice | tr " " "\n")
-
+            
             for i in $choice
             	
             	# Skip empty input; for example, if the user just hits return
@@ -63,7 +63,7 @@ function history --description "Deletes an item from history"
             	end
             
                 #Following two validations could be embedded with "and" but I find the syntax kind of weird. 
-                if not echo $i | grep -q "^[0-9]+\$"
+                if not echo $i | grep -E -q "^[0-9]+\$"
                     printf "Invalid input: %s\n" $i 
                     continue 
                 end