Indent every scope and put opening braces on the signature line

Namespace and extern "C" bodies are indented a level, so nesting is
visible from the indentation rather than only from the braces. Opening
braces stay on the line that opens the scope, including function
definitions, which previously carried theirs on a line of their own.

include/internal/context.hpp

@@ -63,23 +63,21 @@ struct dpm_ctx {
 };
 
 namespace dpm_core {
+    /**
+     * @brief Records a failure reason on the context
+     *
+     * @param ctx The libdpm-core context; NULL is a no-op
+     * @param msg The failure description
+     */
+    void set_error(dpm_ctx* ctx, const std::string& msg);
 
-/**
- * @brief Records a failure reason on the context
- *
- * @param ctx The libdpm-core context; NULL is a no-op
- * @param msg The failure description
- */
-void set_error(dpm_ctx* ctx, const std::string& msg);
-
-/**
- * @brief Loads all configuration files into the context
- *
- * Parses every .conf file in the context's configuration directory
- * into the context's configuration store.
- *
- * @param ctx The libdpm-core context
- */
-void load_config_dir(dpm_ctx* ctx);
-
+    /**
+     * @brief Loads all configuration files into the context
+     *
+     * Parses every .conf file in the context's configuration directory
+     * into the context's configuration store.
+     *
+     * @param ctx The libdpm-core context
+     */
+    void load_config_dir(dpm_ctx* ctx);
 } // namespace dpm_core