palindrome: do not report one char long palindromes

Dependencies

• [2] ZQFONDI4 Add simple version
• [3] VUXCDW3L palindrome: move to palindrome package
• [4] MCHVA5DY Palindrome initial import
• [5] AUM6AXH7 It is enough to check only half of the string because of symmetry

Change contents

• replacement in snippets/palindrome/palindrome.go at line 28
  [2.608]→[2.608:624](∅→∅)
  − return longest
  [2.608]

  [2.624]
  + if len(longest) > 1 {

  + return longest

  + }

  + return ""
• replacement in snippets/palindrome/palindrome.go at line 76
  [3.1270]→[3.1270:1289](∅→∅)
  − result <- longest
  [3.1270]

  [3.1289]
  + if len(longest) > 1 {

  + result <- longest

  + } else {

  + result <- ""

  + }