Fix stuff, help command

styles/REPL/REPLHistory.module.css

@@ -9,4 +9,8 @@
 
 .line {
     padding: 3px 0;
+    white-space: pre-wrap;
+    font-family: inherit;
+    display: block;
+    margin: 0;
 }

styles/REPL/REPLInput.module.css

@@ -53,13 +53,17 @@
 .completionWrapper span {
     padding: 0;
     margin: 0;
-    display: inline-block;
+    display: flex;
+    flex-direction: column;
 }
 
 .typed {
     opacity: 0;
+    flex-shrink: 1;
+    overflow-x: hidden;
 }
 
 .completion {
     color: var(--repl-color-hint);
+    flex-grow: 1;
 }