Numerical bullets must have space after them

Closes #8

plugin/bullets.vim

@@ -40,7 +40,7 @@ end
 
 " Helper methods ----------------------------------------  {{{
 fun! s:match_numeric_list_item(input_text)
-  let l:num_bullet_regex  = '\v^((\s*)(\d+)(\.|\))(\s*))(.*)'
+  let l:num_bullet_regex  = '\v^((\s*)(\d+)(\.|\))(\s+))(.*)'
   let l:matches           = matchlist(a:input_text, l:num_bullet_regex)
 
   if empty(l:matches)

spec/bullets_spec.rb

@@ -75,6 +75,27 @@
         EOF
       end
 
+      it 'does not insert a new numeric bullet for decimal numbers' do
+        filename = "#{SecureRandom.hex(6)}.md"
+        write_file(filename, <<-EOF)
+          # Hello there
+          3.14159 is an approximation of pi.
+        EOF
+
+        vim.edit filename
+        vim.type 'GA'
+        vim.feedkeys '\<cr>'
+        vim.type 'second line'
+        vim.write
+
+        file_contents = IO.read(filename)
+
+        expect(file_contents).to eq normalize_string_indent(<<-EOF)
+          # Hello there
+          3.14159 is an approximation of pi.
+          second line\n
+        EOF
+      end
       it 'adds a new roman numeral bullet' do
         filename = "#{SecureRandom.hex(6)}.md"
         write_file(filename, <<-EOF)