Revert multibyte codepoint fix in 1a1ca39 (#367)

Codepoint width is difficult to determine with complete accuracy. The
previous fix assumed a width of 1, which broke more indentation than
it corrected. Reverting back to the previous behavior is not perfect,
but it's the best solution we have so far.

Fixes #369.

Author: weavejester

cljfmt/src/cljfmt/core.cljc

@@ -194,12 +194,8 @@
 (defn- last-line-in-string ^String [^String s]
   (subs s (inc (.lastIndexOf s "\n"))))
 
-(defn- line-length [line]
-  #?(:clj  (.codePointCount ^String line 0 (.length ^String line))
-     :cljs (.-length (js/Array.from line))))
-
 (defn- margin [zloc]
-  (-> zloc prior-line-string last-line-in-string line-length))
+  (-> zloc prior-line-string last-line-in-string count))
 
 (defn- whitespace [width]
   (n/whitespace-node (apply str (repeat width " "))))

cljfmt/test/cljfmt/core_test.cljc

@@ -2012,17 +2012,23 @@
 
 (deftest test-multibyte-codepoints
   (is (reformats-to?
-       ["(defn- x"
-        "  [x style]"
-        "  (case style"
-        "    :normal x"
-        "    :𝕨𝕚𝕝𝕕   (if (sequential? x)"
-        "       :a"
-        "       :b)))"]
-       ["(defn- x"
-        "  [x style]"
-        "  (case style"
-        "    :normal x"
-        "    :𝕨𝕚𝕝𝕕   (if (sequential? x)"
-        "              :a"
-        "              :b)))"])))
+       ["[(str \"email\""
+        "      \"Brian\")"
+        "(str \"📚 \" (str \"email\""
+        "                  \"Convert\"))"
+        "(str \"⌛️ \" (str \"email\""
+        "                  \"Save\"))"
+        "(str \"🎓 \" (str \"email\""
+        "                  \"Help\"))"
+        "(str \"🔢 \" (str \"email\""
+        "                   \"Leverage\"))]"]
+       ["[(str \"email\""
+        "      \"Brian\")"
+        " (str \"📚 \" (str \"email\""
+        "                 \"Convert\"))"
+        " (str \"⌛️ \" (str \"email\""
+        "                 \"Save\"))"
+        " (str \"🎓 \" (str \"email\""
+        "                 \"Help\"))"
+        " (str \"🔢 \" (str \"email\""
+        "                 \"Leverage\"))]"])))