Added documentation

Author: ileasile

README.md

@@ -92,6 +92,14 @@ The following line magics are supported:
  - `%use <lib1>, <lib2> ...` - injects code for supported libraries: artifact resolution, default imports, initialization code, type renderers
  - `%trackClasspath` - logs any changes of current classpath. Useful for debugging artifact resolution failures
  - `%trackExecution` - logs pieces of code that are going to be executed. Useful for debugging of libraries support
+ - `%output [--max-cell-size=N] [--max-buffer=N] [--max-buffer-newline=N] [--max-time=N] [--no-stdout] [--reset-to-defaults]` - 
+ output capturing settings.
+     - `max-cell-size` specifies the characters count which may be printed to stdout. Default is 100000.
+     - `max-buffer` - max characters count stored in internal buffer before being sent to client. Default is 10000.
+     - `max-buffer-newline` - same as above, but trigger happens only if newline character was encountered. Default is 100.
+     - `max-time` - max time in milliseconds before the buffer is sent to client. Default is 100.
+     - `no-stdout` - don't capture output. Default is false.
+     - `reset-to-defaults` - reset all output settings that were set with magics to defaults
 
 ### Supported Libraries
 

src/main/kotlin/org/jetbrains/kotlin/jupyter/magics.kt

@@ -12,7 +12,7 @@ enum class ReplLineMagics(val desc: String, val argumentsUsage: String? = null,
     trackClasspath("log current classpath changes"),
     trackExecution("log code that is going to be executed in repl", visibleInHelp = false),
     dumpClassesForSpark("stores compiled repl classes in special folder for Spark integration", visibleInHelp = false),
-    output("setup output settings", "--max 1000 --no-stdout --time-interval-ms 100 --buffer-limit 400")
+    output("setup output settings", "--max-cell-size=1000 --no-stdout --max-time=100 --max-buffer=400")
 }
 
 fun processMagics(repl: ReplForJupyter, code: String): String {