fix(grainfmt): Properly handle if/then/else line breaks (#1217)

Fix a formatter error

Co-authored-by: Marcus Roberts <marcus@marcusr.com>

Author: marcusroberts

compiler/grainformat/format.re

@@ -2735,7 +2735,7 @@ and print_expression =
           ])
         | _ =>
           Doc.concat([
-            Doc.line,
+            if (true_is_block) {Doc.space} else {Doc.line},
             Doc.text("else"),
             if (true_is_block) {
               false_made_block := true;

compiler/test/formatter_inputs/ifthenelse.gr

@@ -3,3 +3,7 @@ if (true) { "a reallly long string long long long lfd dsds dsds dsds"} else if (
 if (SomeModule.ne(mval, 10)) (if (SomeModule.ltS(yval, 11)) SomeModule.sub(12, mres) else mres) else 14
 
 if (SomeModule.ne(mval, 10000)) (if (SomeModule.ltS(yval, 111111)) SomeModule.sub(1323232, mres) else mres) else 1232324
+
+if (1 ==2) {
+    print("false")
+} else print("true")

compiler/test/formatter_outputs/ifthenelse.gr

@@ -13,3 +13,9 @@ if (SomeModule.ne(mval, 10)) (
 if (SomeModule.ne(mval, 10000)) (
   if (SomeModule.ltS(yval, 111111)) SomeModule.sub(1323232, mres) else mres
 ) else 1232324
+
+if (1 == 2) {
+  print("false")
+} else {
+  print("true")
+}