Fix formatting for space indented mode

Author: oli-obk

src/format.rs

@@ -222,6 +222,7 @@ impl Buffers {
 
 pub struct FmtEvent<'a> {
     pub bufs: &'a mut Buffers,
+    pub lines: bool,
 }
 
 impl<'a> Visit for FmtEvent<'a> {
@@ -235,7 +236,12 @@ impl<'a> Visit for FmtEvent<'a> {
             #[cfg(feature = "tracing-log")]
             name if name.starts_with("log.") => {}
             name => {
-                write!(buf, "\n {}={:?}", name, value).unwrap();
+                if self.lines {
+                    write!(buf, "\n ").unwrap()
+                } else {
+                    write!(buf, ", ").unwrap()
+                }
+                write!(buf, "{}={:?}", name, value).unwrap();
             }
         }
     }

src/lib.rs

@@ -212,16 +212,18 @@ where
         V: fmt::Display + 'a,
     {
         let mut kvs = kvs.into_iter();
-        let nl = if self.config.bracketed_fields {
-            ""
+        let (nl, first) = if self.config.bracketed_fields {
+            ("", "")
+        } else if self.config.indent_lines {
+            ("\n ", "\n ")
         } else {
-            "\n "
+            (", ", " ")
         };
         if let Some((k, v)) = kvs.next() {
             if k == "message" {
                 write!(buf, " {}", v)?;
             } else {
-                write!(buf, "{nl}{}={}", k, v)?;
+                write!(buf, "{first}{}={}", k, v)?;
             }
         }
         for (k, v) in kvs {
@@ -412,7 +414,10 @@ where
             .expect("Unable to write to buffer");
         }
 
-        let mut visitor = FmtEvent { bufs };
+        let mut visitor = FmtEvent {
+            bufs,
+            lines: self.config.indent_lines,
+        };
         event.record(&mut visitor);
         visitor
             .bufs