Fix for long attribute values containing = sign

lib/erb/formatter.rb

@@ -26,9 +26,11 @@ def format(q)
 
   class Error < StandardError; end
 
+  SPACES = /\s+/m
+
   # https://stackoverflow.com/a/317081
   ATTR_NAME = %r{[^\r\n\t\f\v= '"<>]*[^\r\n\t\f\v= '"<>/]} # not ending with a slash
-  UNQUOTED_VALUE = ATTR_NAME
+  UNQUOTED_VALUE = %r{[^<>'"\s]+}
   UNQUOTED_ATTR = %r{#{ATTR_NAME}=#{UNQUOTED_VALUE}}
   SINGLE_QUOTE_ATTR = %r{(?:#{ATTR_NAME}='[^']*?')}m
   DOUBLE_QUOTE_ATTR = %r{(?:#{ATTR_NAME}="[^"]*?")}m
@@ -136,17 +138,18 @@ def format_attributes(tag_name, attrs, tag_closing)
     attrs.scan(ATTR).flatten.each do |attr|
       attr.strip!
       name, value = attr.split('=', 2)
-      if UNQUOTED_ATTR =~ attr
-        attr_html << indented("#{name}=\"#{value}\"")
-        next
-      end
 
       if value.nil?
         attr_html << indented("#{name}")
         next
       end
 
-      value_parts = value[1...-1].strip.split(/\s+/)
+      if /\A#{UNQUOTED_VALUE}\z/o.match?(value)
+        attr_html << indented("#{name}=\"#{value}\"")
+        next
+      end
+
+      value_parts = value[1...-1].strip.split(SPACES)
       value_parts.sort_by!(&@css_class_sorter) if name == 'class' && @css_class_sorter
 
       full_attr = "#{name}=#{value[0]}#{value_parts.join(" ")}#{value[-1]}"
@@ -231,7 +234,7 @@ def format_text(text)
 
     return if text.match?(/\A\s*\z/m) # empty
 
-    text = text.gsub(/\s+/m, ' ').strip
+    text = text.gsub(SPACES, ' ').strip
 
     offset = indented("").size
     # Restore full line width if there are less than 40 columns available

test/fixtures/attributes.html.erb

@@ -5,4 +5,7 @@
      sizes="(max-width: 600px) 480px,
             (max-width: 1000px) 800px,
             1200px"
-     data-autocomplete-min-length-value=2>
+     data-autocomplete-min-length-value=2
+     data-short-url="//test.com/?q=v"
+     data-long-url="https://google.ca/this-is-a-long-url-with-a-query-string?query=something"
+     data-long-url-single='https://google.ca/this-is-a-long-url-with-a-query-string?query=something'>

test/fixtures/attributes.html.expected.erb

@@ -4,4 +4,7 @@
   srcset="image-480w.jpg 480w, image-800w.jpg 800w, image-1200w.jpg 1200w"
   sizes="(max-width: 600px) 480px, (max-width: 1000px) 800px, 1200px"
   data-autocomplete-min-length-value="2"
+  data-short-url="//test.com/?q=v"
+  data-long-url="https://google.ca/this-is-a-long-url-with-a-query-string?query=something"
+  data-long-url-single='https://google.ca/this-is-a-long-url-with-a-query-string?query=something'
 >

test/fixtures/multiline_attributes.html.erb

@@ -4,3 +4,9 @@ aria-disabled:text-gray-300 aria-disabled:bg-transparent aria-disabled:border-gr
 
 <nav class="
 flex flex-col bg-gray-15 p-4 w-full       " data-controller="<%= stimulus_id %>" data-<%= stimulus_id %>-cookie-value="solidus_admin"> Foooo </nav>
+
+<p
+single-double-quotes='"double" quotes'
+double-single-quotes="'single' quotes"
+escaped-quotes=escaped&quote;quotes
+></p>

test/fixtures/multiline_attributes.html.expected.erb

@@ -15,3 +15,9 @@
 >
   Foooo
 </nav>
+
+<p
+  single-double-quotes='"double" quotes'
+  double-single-quotes="'single' quotes"
+  escaped-quotes="escaped&quote;quotes"
+></p>