Clarify some comments that specify output

Author: Sainan

docs/New Features/Default Arguments.md

@@ -7,8 +7,8 @@ local function write(text = "No text provided.")
     print(text)
 end
 
-write()         --> "No text provided."
-write("Hello!") --> "Hello!"
+write()         --> No text provided.
+write("Hello!") --> Hello!
 ```
 ```pluto showLineNumbers title="This code behaves identically."
 local function write(text)
@@ -18,8 +18,8 @@ local function write(text)
     print(text)
 end
 
-write()         --> "No text provided."
-write("Hello!") --> "Hello!"
+write()         --> No text provided.
+write("Hello!") --> Hello!
 ```
 
 #### [Try It Yourself](https://pluto-lang.org/web/#code=local%20function%20write(text%20%3D%20%22No%20text%20provided.%22)%0D%0A%20%20%20%20print(text)%0D%0Aend%0D%0A%0D%0Awrite()%20%20%20%20%20%20%20%20%20--%3E%20%22No%20text%20provided.%22%0D%0Awrite(%22Hello!%22)%20--%3E%20%22Hello!%22)

docs/New Features/For-As Loop.md

@@ -8,11 +8,11 @@ for t as value do
     print(value)
 end
 
--- 1
--- 2
--- 3
--- hello
--- world
+--> 1
+--> 2
+--> 3
+--> hello
+--> world
 ```
 That code is identical to this:
 ```pluto showLineNumbers title="Old Code"

docs/New Features/Named Varargs.md

@@ -10,7 +10,7 @@ function vfunc(...)
         print(arg)
     end
 end
-vfunc("Hello") -- "Hello"
+vfunc("Hello") --> Hello
 ```
 
 But, with named varargs, it can be as simple as this:
@@ -21,7 +21,7 @@ function vfunc(...args)
         print(arg)
     end
 end
-vfunc("Hello") -- "Hello"
+vfunc("Hello") --> Hello
 ```
 
 #### [Try It Yourself](https://pluto-lang.org/web/#code=function%20vfunc(...args)%0D%0A%20%20%20%20for%20args%20as%20arg%20do%0D%0A%20%20%20%20%20%20%20%20print(arg)%0D%0A%20%20%20%20end%0D%0Aend%0D%0Avfunc(%22Hello%22)%20--%20%22Hello%22)

docs/New Features/String Interpolation.md

@@ -6,13 +6,13 @@ String interpolation is a simple alternative syntax to concatenation.
 ```pluto title="Concatenation"
 local label = "meaning of life"
 local data = { value = 42 }
-print("The " .. label .. " is " .. data.value) -- "The meaning of life is 42"
+print("The " .. label .. " is " .. data.value) --> The meaning of life is 42
 ```
 
 ```pluto title="String Interpolation"
 local label = "meaning of life"
 local data = { value = 42 }
-print($"The {label} is {data.value}") -- "The meaning of life is 42"
+print($"The {label} is {data.value}") --> The meaning of life is 42
 ```
 #### [Try It Yourself](https://pluto-lang.org/web/#code=local%20label%20%3D%20%22meaning%20of%20life%22%0D%0Alocal%20data%20%3D%20%7B%20value%20%3D%2042%20%7D%0D%0Aprint(%24%22The%20%7Blabel%7D%20is%20%7Bdata.value%7D%22)%20--%20%22The%20meaning%20of%20life%20is%2042%22)