Fix the ns-resolve function to resolve aliased symbols (#313)

* Fix the ns-resolve function to resolve aliased symbols

* Remove unnecessary extra var

Author: chrisrink10

src/basilisp/core/__init__.lpy

@@ -1539,7 +1539,7 @@
 (defn ns-resolve
   "Return the Var which will be resolved by the symbol in the given namespace."
   [ns sym]
-  (.find ns sym))
+  (basilisp.lang.runtime/resolve-var sym ns))
 
 (defn resolve
   "Return the Var which will be resolved by the symbol in the namespace currently

src/basilisp/lang/runtime.py

@@ -924,6 +924,12 @@ def resolve_alias(s: sym.Symbol, ns: Optional[Namespace] = None) -> sym.Symbol:
             return sym.symbol(s.name, ns=ns.name)
 
 
+def resolve_var(s: sym.Symbol, ns: Optional[Namespace] = None) -> Optional[Var]:
+    """Resolve the aliased symbol to a Var from the specified
+    namespace, or the current namespace if none is specified."""
+    return Var.find(resolve_alias(s, ns))
+
+
 def add_generated_python(
     generated_python: str,
     var_name: str = _GENERATED_PYTHON_VAR_NAME,

src/basilisp/repl.lpy

@@ -35,7 +35,7 @@
 (defmacro doc
   "Print the docstring from an interned Var if found."
   [s]
-  `(print-doc (var ~s)))
+  `(print-doc (resolve (quote ~s))))
 
 (defn print-source
   "Print the source forms for a function."
@@ -45,4 +45,4 @@
 (defmacro source
   "Print the source code for a form if found."
   [s]
-  `(print-source (var ~s)))
+  `(print-source (resolve (quote ~s))))