Fix spelling errors (#846)

Also: change checksums due to filename and content changes, and fix language snippet test output to produce correct error messages

pkl-cli/src/main/kotlin/org/pkl/cli/commands/AnalyzeCommand.kt

@@ -40,7 +40,7 @@ class AnalyzeCommand(helpLink: String) :
       ModulesCommand(
         name = "imports",
         helpLink = helpLink,
-        help = "Prints the the graph of modules imported by the input module(s)."
+        help = "Prints the graph of modules imported by the input module(s)."
       ) {
 
       private val outputPath: Path? by