Print single element on same line

Author: nojaf

compiler/syntax/src/res_printer.ml

@@ -4419,7 +4419,7 @@ and print_jsx_fragment ~state (opening_greater_than : Lexing.position)
   in
   let line_sep =
     if
-      List.length children > 0
+      List.length children > 1
       || List.exists ParsetreeViewer.is_jsx_expression children
     then Doc.hard_line
     else Doc.line

tests/syntax_tests/data/conversion/reason/expected/string.res.txt

@@ -8,9 +8,7 @@ carriage return`
 let x = "\""
 let y = "\n"
 
-<>
-  {"\n"->React.string}
-</>
+<> {"\n"->React.string} </>
 
 // The `//` should not result into an extra comment
 let x = `https://www.apple.com`

tests/syntax_tests/data/printer/expr/expected/braced.res.txt

@@ -318,9 +318,5 @@ let x = {
 }
 
 // string constant should be printed correct
-<>
-  {"\n"->React.string}
-</>
-<>
-  {"\""->React.string}
-</>
+<> {"\n"->React.string} </>
+<> {"\""->React.string} </>

tests/syntax_tests/data/printer/expr/expected/jsx.res.txt

@@ -315,9 +315,7 @@ let x = <MyComponent sidebar={<div> test </div>} nav={<Navbar />} />
 module App = {
   @react.component
   let make = () => {
-    <>
-      1
-    </>
+    <> 1 </>
   }
 }
 
@@ -437,10 +435,7 @@ let x = <C> ...{() => msg->React.string} </C>
 
 let x = <C> ...{array->Array.map(React.string)} </C>
 
-let x =
-  <>
-    {array->Array.map(React.string)}
-  </>
+let x = <> {array->Array.map(React.string)} </>
 
 let x = {
   let _ = <div />
@@ -453,10 +448,7 @@ let x = {
 }
 
 let x = {
-  let _ =
-    <>
-      {children}
-    </>
+  let _ = <> {children} </>
   msg->React.string
 }