add default prefix separator

- no need to add '_' to the prefix

4 files changed, 6 insertions, 6 deletions

diff --git a/examples/hierarchical-env/src/settings.rs b/examples/hierarchical-env/src/settings.rs
index 75a9186..bde5819 100644
--- a/examples/hierarchical-env/src/settings.rs
+++ b/examples/hierarchical-env/src/settings.rs
@@ -55,7 +55,7 @@ impl Settings {
 
         // Add in settings from the environment (with a prefix of APP_)
         // Eg.. `APP_DEBUG=1 ./target/app` would set the `debug` key
-        s.merge(Environment::with_prefix("app_"))?;
+        s.merge(Environment::with_prefix("app"))?;
 
         // You may also programmatically change settings
         s.set("database.url", "postgres://")?;
diff --git a/examples/simple/src/main.rs b/examples/simple/src/main.rs
index 67a1069..8c738a8 100644
--- a/examples/simple/src/main.rs
+++ b/examples/simple/src/main.rs
@@ -9,7 +9,7 @@ fn main() {
         .merge(config::File::with_name("Settings")).unwrap()
         // Add in settings from the environment (with a prefix of APP_)
         // Eg.. `APP_DEBUG=1 ./target/app` would set the `debug` key
-        .merge(config::Environment::with_prefix("APP_")).unwrap();
+        .merge(config::Environment::with_prefix("APP")).unwrap();
 
     // Print out our settings (as a HashMap)
     println!("{:?}",
diff --git a/src/env.rs b/src/env.rs
index 5f7e92f..b26dc56 100644
--- a/src/env.rs
+++ b/src/env.rs
@@ -9,10 +9,10 @@ pub struct Environment {
     /// Optional prefix that will limit access to the environment to only keys that
     /// begin with the defined prefix.
     ///
-    /// A prefix is tested to be present on each key before its considered
+    /// A prefix with a separator of `_` is tested to be present on each key before its considered
     /// to be part of the source environment.
     ///
-    /// For example, the key `CONFIG_DEBUG` would become `DEBUG` with a prefix of `config_`.
+    /// For example, the key `CONFIG_DEBUG` would become `DEBUG` with a prefix of `config`.
     prefix: Option<String>,
 
     /// Optional character sequence that separates each key segment in an environment key pattern.
@@ -69,7 +69,7 @@ impl Source for Environment {
 
         // Define a prefix pattern to test and exclude from keys
         let prefix_pattern = match self.prefix {
-            Some(ref prefix) => Some(prefix.clone() + &separator),
+            Some(ref prefix) => Some(prefix.clone() + "_"),
             _ => None,
         };
 
diff --git a/tests/env.rs b/tests/env.rs
index fc93f15..2a55d7f 100644
--- a/tests/env.rs
+++ b/tests/env.rs
@@ -18,7 +18,7 @@ fn test_default() {
 fn test_prefix_is_removed_from_key() {
     env::set_var("B_A_C", "abc");
 
-    let environment = Environment::with_prefix("B_");
+    let environment = Environment::with_prefix("B");
 
     assert!(environment.collect().unwrap().contains_key("a_c"));