fix: test file function (#78)

Test file function wasn't working anymore. It didn't find functions to
test even though the sed found them.

Problem was in the escaping the pipe sign.

Co-authored-by: Ales Brelih <ales.brelih@3fs.si>

lua/go/gotest.lua

@@ -236,7 +236,7 @@ M.test_file = function(...)
   -- local testcases = [[sed -n 's/func.*\(Test.*\)(.*/\1/p' | xargs | sed 's/ /\\\|/g']]
   local fpath = vim.fn.expand("%:p")
   -- utils.log(args)
-  local cmd = [[cat ]] .. fpath .. [[| sed -n 's/func.*\(Test.*\)(.*/\1/p' | xargs | sed 's/ /\\|/g']]
+  local cmd = [[cat ]] .. fpath .. [[| sed -n 's/func.*\(Test.*\)(.*/\1/p' | xargs | sed 's/ /\|/g']]
   -- TODO maybe with treesitter or lsp list all functions in current file and regex with Test
   local tests = vim.fn.systemlist(cmd)
   utils.log(cmd, tests)