Adjust repl to allow dropping the parens around `?`

`?` with no arg also returns its own help text.
Improve web help texts.

src/env.c

@@ -283,12 +283,16 @@ void printColored(const char* code)
 }
 
 fn(help,
-   "Displays help text for the given function.\n"
+   "Gets a string with help text for the given function.\n"
-   "Currently requires the function name as a string, but future syntactic sugar may\n"
+   "For example:\n"
-   "loosen this requirement.\n"
+   "  (? islist) => \"(islist (1 2 3)) => T\""
-   "(? \"+\") => \"(+ 1 2) => 3\""
 ) {
-    const char* symbol = params[0].string;
+    const char* symbol;
+    if (!length || !params[0].string || params[0].string[0] == '\0') {
+        symbol = "?";
+    } else {
+        symbol = params[0].string;
+    }
     for (int i = 0; i < currentHelp; i++) {
         struct helpText h = helpTexts[i];
         if (strcmp(symbol, h.symbol) == 0) {
@@ -308,6 +312,7 @@ fn(help,
             return text;
         }
     }
+
     return nullTerminated("Help not found!");
 }
 

src/pebblisp.c

@@ -606,6 +606,12 @@ void repl(struct Environment* env)
             break;
         }
         add_history(buf);
+        if (buf[0] == '?' && (buf[1] == ' ' || buf[1] == '\0')) {
+            char* oldBuf = buf;
+            buf = malloc(sizeof(char) * strlen(buf + 3));
+            sprintf(buf, "(%s)", oldBuf);
+            free(oldBuf);
+        }
         Object o = parseEval(buf, env);
         size_t length;
         char *output = stringObj(&o, &length);

src/web.h

@@ -9,16 +9,17 @@ fn(startServer,
 );
 
 fn(addGetRoute,
-   "Note: Implementation bugs currently prevent using an inline lambda.\n"
+   "Adds a GET route at the given path with the given function.\n"
-   "  (def homepage (fn () (\"Hello, world!\")))\n"
+   "  (get \"/\" (fn () (\"Hello, world!\")))\n"
-   "  (get \"/\" homepage)\n"
+   "  (get \"/parampath\" (fn (req) (req's queryParams)))\n"
-   "  (def queryPage (fn (req) (req's queryParams)))\n"
-   "  (get \"/x\" queryPage)\n"
    "  (serve)\n"
+   "Also see: (serve)\n"
 );
 
 fn(addPostRoute,
-   "Note: Implementation bugs currently prevent using an inline lambda.\n"
+   "Adds a POST route at the given path with the given function.\n"
-   "  (def homepage (fn () (\"Hello, world!\")));(post \"/\" homepage)\n"
+   "Note: Can't do anything with POSTed data yet.\n"
+   "  (post \"/\" (fn () (\"Hello, world!\")))\n"
    "  (serve)\n"
+   "Also see: (serve)\n"
 );