Don't linebreak keys with spaces (#1053)

* Don't linebreak keys with spaces

Resolves #1052

* Update kotlin/codegen/src/main/java/com/squareup/moshi/kotlin/codegen/api/AdapterGenerator.kt

kotlin/codegen/src/main/java/com/squareup/moshi/kotlin/codegen/api/AdapterGenerator.kt

@@ -121,10 +121,17 @@ internal class AdapterGenerator(
   private val optionsProperty = PropertySpec.builder(
       nameAllocator.newName("options"), JsonReader.Options::class.asTypeName(),
       KModifier.PRIVATE)
-      .initializer("%T.of(${nonTransientProperties.joinToString(", ") {
-        // We manually put in quotes because we know the jsonName is already escaped
-        CodeBlock.of("\"%L\"", it.jsonName).toString()
-      }})", JsonReader.Options::class.asTypeName())
+      .initializer(
+          "%T.of(%L)",
+          JsonReader.Options::class.asTypeName(),
+          nonTransientProperties
+              .map {
+                // We manually put in quotes because we know the jsonName is already escaped.
+                val whitespaceSafeName = it.jsonName.replace(" ", "·")
+                CodeBlock.of("\"$whitespaceSafeName\"")
+              }
+              .joinToCode(", ")
+      )
       .build()
 
   private val constructorProperty = PropertySpec.builder(

kotlin/tests/src/test/kotlin/com/squareup/moshi/kotlin/codegen/GeneratedAdaptersTest.kt

@@ -1216,6 +1216,18 @@ internal data class MismatchParentAndNestedClassVisibility(
   )
 }
 
+// Regression test for https://github.com/square/moshi/issues/1052
+// Compile-only test
+@JsonClass(generateAdapter = true)
+data class KeysWithSpaces(
+    @Json(name = "1. Information") val information: String,
+    @Json(name = "2. Symbol") val symbol: String,
+    @Json(name = "3. Last Refreshed") val lastRefreshed: String,
+    @Json(name = "4. Interval") val interval: String,
+    @Json(name = "5. Output Size") val size: String,
+    @Json(name = "6. Time Zone") val timeZone: String
+)
+
 // Has to be outside to avoid Types seeing an owning class
 @JsonClass(generateAdapter = true)
 data class NullableTypeParams<T>(