Fix GRPC_TRACE doc formatting
Add newlines so that the description of 'all' and the example appear on separate lines (and not as part of the final bullet point)
diff --git a/doc/environment_variables.md b/doc/environment_variables.md
index d02801b..832762a 100644
--- a/doc/environment_variables.md
+++ b/doc/environment_variables.md
@@ -55,10 +55,12 @@
- secure_endpoint - traces bytes flowing through encrypted channels
- transport_security - traces metadata about secure channel establishment
- tcp - traces bytes in and out of a channel
+
'all' can additionally be used to turn all traces on.
Individual traces can be disabled by prefixing them with '-'.
+
Example:
- export GRPC_TRACE=all,-pending_tags
+ export GRPC_TRACE=all,-pending_tags
* GRPC_VERBOSITY
Default gRPC logging verbosity - one of: